Add regression tests

Closes sympy/sympy#19745 Closes sympy/sympy#9358
skirpichev · Aug 19, 2021 · eb99d87 · eb99d87
1 parent 74a0994
commit eb99d87
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diff --git a/diofant/tests/concrete/test_sums_products.py b/diofant/tests/concrete/test_sums_products.py
@@ -597,6 +597,9 @@ def test_Sum_interface():
     # issue sympy/sympy#21888
     pytest.raises(ValueError, lambda: Sum(-1, (x, I, 5)))
 
+    # issue sympy/sympy#19745
+    pytest.raises(ValueError, lambda: Sum(x, (x, 1, Rational(3, 2))))
+
 
 def test_eval_derivative():
     assert Sum(x, (x, 1, 2)).diff(x) == 0

diff --git a/docs/release/notes-0.13.rst b/docs/release/notes-0.13.rst
@@ -123,3 +123,5 @@ These Sympy issues also were addressed:
 * :sympyissue:`21890`: RecursionError and TypeError in nonlinsolve
 * :sympyissue:`21888`: TypeError raised for evalf containing summations
 * :sympyissue:`5822`: What should summation() do with non-integer limits?
+* :sympyissue:`19745`: Weird value of a sum
+* :sympyissue:`9358`: summation: Wrong out for non-integral range